Improved drill for rock and earth with attached tube



UNITED STATES PATENT OEEIGE.

L. M. RUMSEY AND W. I. SMITH, OF ST. LOUIS, MISSOURI.

IMPROVED DRILL FOR ROCK AND EARTH WITH ATTACHED TUBE.

Specification forming part of Letters Patent N0. 90,787, dated J une 1, 1869.

To all whom fit may concern:

Be it known that we, L. M. RUMSEY and W. P. SMITH, of St. Louis, in the county of St. Louis and State of Missouri, have invented a new and Improved Drill; and we do hereby declare that the following is a full, clear, and

exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying tlrawings,formingpart of this specification.

This invention relates to a new and useful improvement in drills for penetrating earth or rock for obtaining water or for other purposes; and it consists in the peculiar construction of the drill and its tube or shank, as will be hereinafter described.

Figure l represents a longitudinal view of the drill, showing the form of its cutting end, and also showing the spirallygrooved and perforated tube to which the drill is attached, and a section of the screen thereon. Fig. 2 is a view of the cutting end of the drill, showing the arrangement and position of the cuttingedges.

Similar letters of reference indicate corresponding` parts.

A is the drill. the screen.

The cutting end of the drill is so formed that two cutting-edges, d d, corresponding in width with the diameter of the end, cross each other centrally at right angles, forming thereby four B is the tube. C represents radialcutting chisels, as seen in Fig. 2.

c represents tapering triangular grooves or recesses, which extend from the edges and terminate at the point f, making the grooves in effect spiral. The construction is such that the drill can be driven spirally into the earth. The form of each of the chisels is plainly seen in Fig. l, (represented by d.)

The tube B is provided withA two or more spiral grooves, as seen in the drawing, and it is perforated at the bottom of one or more of the grooves, for the purpose of allowing afree passage for the water into the tube.

g is a wire for fastening the screen C to the tube. This wire passes up in one ofthe grooves over the screen, and sinking the screen into the groove, which prevents injury to the Wire while driving the drill.

The tube is covered by the screen, which is made of woven wire-cloth or tnely-perforated metal. n

The spiral-grooved tube is smaller at the point of contact with the drill than at the point ot contact with the pipe, with a regular taper, so that in driving the screen will be tightened at every point of contact with the spiral-grooved tube, which entirely prevents its slipping.

We claim as new and desire to secure by Letters Patent- 1. The drill formed in one piece, with three or more cutting chisel-edges radiating from a common center, and arranged in such a manner that wedge-shaped grooves e are formed between each wedge-shaped chisel, terminating at the point f, as herein described, for the purpose specified.

2. The tube B, grooved spirally and perforated, substantially as and for the purposes described.

3. Fastening a screen onto a well-tube by a wire, which forces the screen into a spiral groove of the tube, so that the wire is depressed below the surface of the screen, substantially as shown and described.

4. The combination of the tube B with the drill A, or with any drill equivalent thereto, substantially as and for the purposes specified.

L. M. RUMSEY. W. P. SMITH.

Witnesses:

s. o. LAWRENCE, M. RUMSEY. 

